ECCO2: HighResolution GlobalOcean and SeaIce Data Synthesis

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ECCO2 High-Resolution Global-Ocean and Sea-Ice
Data Synthesis
MIT Marshall, Heimbach, Hill Wunsch JPL Fu, Kwok,
Lee Menemenlis Zlotnicki GSFC Rienecker
Suarez ARC Henze, Taft HARVARD Tziperman GFDL Adcr
oft ARGONNE Hovland, Utke
Velocity (m/s) At 15 m depth
Objective synthesis of global-ocean and sea-ice
data that covers the full ocean depth and that
permits eddies. Motivation quantify role of
oceans in global carbon cycle, understand recent
evolution of polar oceans, monitor time-evolving
term balances within and between different
components of Earth system, etc., etc.
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Preliminary eddy-permitting estimate using
Greens functions
Perturbation experiments are being computed for
different initial conditions, surface forcing
fields, and empirical model parameters. Formally
combining the different perturbations in order to
minimize the overall difference between model and
observations generates state estimates that are
consistent with both the underlying model physics
and the available observations (Menemenlis,
Fukumori, and Lee, 2005).